5605661506 has 8 divisors (see below), whose sum is σ = 8408913084. Its totient is φ = 2802690480.

The previous prime is 5605661497. The next prime is 5605661507. The reversal of 5605661506 is 6051665065.

It can be written as a sum of positive squares in 2 ways, for example, as 5415635281 + 190026225 = 73591^2 + 13785^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (5605661507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9805 + ... + 106336.

Almost surely, 2^5605661506 is an apocalyptic number.

5605661506 is a deficient number, since it is larger than the sum of its proper divisors (2803251578).

5605661506 is a wasteful number, since it uses less digits than its factorization.

5605661506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140276.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 5605661506 is about 74870.9657076760. The cubic root of 5605661506 is about 1776.4062392895.

The spelling of 5605661506 in words is "five billion, six hundred five million, six hundred sixty-one thousand, five hundred six".